Rapping machine for dust collectors



March 18, 1930. M. A. EIBEN 1,751,138

RAPPING MACHINE FOR DUST COLLECTORS Filed Oct. 29, 1927 2 Sheets-Sheet 2 mu m1 9 US r1 )1 L T INVENTOR.

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Patented Mar. 18, 1930 P A T MICHAEL A. EIBEN, OF CLEVELAND, OHIO RAPIING MACHINE FOR DUST COLLECTORS Application filed October 29, 1927. Serial No. 229,673.

The purpose of this invention is to provide a mechanical means for rapping the screens of a dust collector apparatus and which will eifectively rap the screens without any attention on part of the worker.

One of the important objects of the invention is that by the means of this machine each and every screen in the dust collector apparatus receives a thorough rapping the advantage of which is quite obvious.

In the accompanying drawings Fig. 1 is a general view of a dust collecting'device or apparatus equipped with a traveling rapper for shaking the collected dust material ofi' the screens. Fig. 2 is a longitudinal section thru the rapping device. Fig. 3 is a section on line 33 of Fig. 2. Fig. at is a section on line 44 of Fig. 2. Fig. 5 is a perspective view of an assembled cam shaft. Fig. 6 is a simplified diagram of the electrical connections.

Referring specifically to the drawings 1 is an electric motor which is connected through suitable reducing gear to the axle 3 as shown in Fig. 2. Said speed reduction may conveniently be accomplished as shown by means of a spur gear 4 mounted on motor shaft 5 and meshing with an internal gear 6 upon the exterior of which are located the threads of a worm 7 The said worm 7 in turn meshes with and drives a worm gear 8 secured to above mentioned axle 3. Said axle 3 has mounted securely thereon the driving wheels 9 as shown in Fig. 4. These driving wheels 9 as shown are provided with a multiplicity of driving pins 10 adapted to engage with a series of holes 11 in the rail 12 upon which the rapping device is arranged to travel. See

Fig. 1. Upon reaching predetermined points at each end of its travel upon said rails 12 the rapping device engages with the trip lever 13 on rock shaft 13 of limit switch 1 1, which parts are duplicated at each end of the track, by means of which the electric connections to the motor are reversed, causing the rapping device to stop its travel in one direction and proceed in the opposite direction automatically. The electrical connections are conventional and any suitable kind of reversing switches may be used.

The electric motor 1 and gearing in connecscreens 33 under which the rapping device is tion therewith are mounted in a housing or casing 15 whichma-y conveniently be closed dust-tight by the cover plates 16 and 17.

Said electric motor 1 also has mounted upon the shaft 5 thereof on the opposite end from gear 4 a bevel pinion 18. Upon the opposite sides of said bevel pinion '18 are meshed the bevel gears 19 and 19 free to rotate on the shaft 23 which by reason of their location will be driven in opposite directions by the rotation of said bevel pinion 18. Furthermore, upon the reversal of the'direction of rotation of the motor 1 as above explained the direction of rotation of said bevel gears 19 and 19 will likewise each be reversed whereby it will be seen that in either event one of said bevel gears 19 and 19 will be rotating in such direction that the one of the pawls 20 mounted on each will engage with the notch 21 in one of the ratchets 22 adjacent thereto and cause said ratchet 22 and the cam shaft 23 to which ratchet 22 is attached to revolve always in the same direction. It will be seen that when the pawl 20 on one bevel gear 19 or 19 is driving the cam shaft 23 the pawl 20 on the other bevel gear 19 or 19 is riding free over the ratchet 22 adjacent thereto.

It willbe noted that the pawl 20 may be conveniently held against the ratchet 22 by means of a spring 24. The cam shaft 23 carries in addition to ratchets 22 a cam 25" which impinges upon a button 26 attached to the arm 27 of a rapping rod 28 slidably mounted in the housing 15. Said rapping rod 28 is attached to a rapping head 29 or hammer which may conveniently be provided as shown with a replaceable rapping block 30. A. spring 31 is interposed between the housing 15 and the rapping head 29 to actuate the blow delivered by the rapping pad 30 at each release by the cam 25. A further'dust exclusion for the joint where the rapping head 29 emerges from the housing 15 is conveniently made by a sleeve 31 of flexible material secured by wires 32 to said rapping head 29 and housing 15. By the means above explained it will b seen that the rapping pad 30 is caused to make a succession of blows against the dust arrester traveling.

By this construction it is possible to have one standard size of rapping device which is applicable to any length assembly of dust arrester screens.

I claim:

1. A rapping machine for dust arresters or the like having a series of screens, comprising a reciprocating carriage movable across the screens, a motor mounted on the carriage, a rapping device carried by the carriage, and a connecting mechanism to said device actuated by the motor to rap the screens.

2. A rapping machineas set forth in claim 1, the motor having driving connectionsto the carriage.

3. A rapping machine asset forth in claim 1, the motor having.driving'connections to the carriage, andmeans to automatically reverse the movement of the carriage at a limit of travel in either direction.

4. A rapping machine as set forth in claim 1, the motor being reversible and having driving connections .to thecarriage, and means ;to automatically reverse the motor at a limit of travel of the carriage in either'direction.

5. The combination. with a dustarrester' having a series of screens, of a rapping machine comprising a carriage movable across the screens, a-IIlOiSOPCEtITlGCl thereby, a hammer mounted on the carriageand-arranged to strike the screens, and operating-connections between the motor'and the hammer.

The combination with adust'arrester having a series of screens, of a rapping machine comprising acarriage movable across the screens, a motor. carried by the carriage,

a spring-operated hammer mounted on the v carriageand arranged to strike the screens,

and a trip mechanism operated by-th'e motor and operating on the hammer to'retract the same against the tension of thespring.

7. The combination with a dust: arrester having a-series of screens,- of a rappingmachine comprising av wheeledcasing movable across the screens, a motor in the casin geared to-the'wheels, a trip hammer carried by the casing and arranged zto strike the screens, and tripmechanism operated bythe motor to retract'and releasethe hammer.

8. The combination with a series'of screens,

of a. track extending across the same, a

, wheeled casing traveling thereon, a reversible.

motor in the casing, driving gearingvbetween the motor and the Wheels, a trlp hammer carried by the casing and arranged to strlke the screens, trip mechanism operated by the motor, to retract and release the hammer, and

means to automatically reverse themotor at 1 the end of the track.

9. The combination With a series of screens, of a rappingmachine comprising a casing movable across thescreens, a spring; actuated trip hammer mounted thereon and arranged to strike the screens, a motor in-thev ture MICHAEL. A. EIBEN: 

